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We present the first far infrared (FIR) dust emission polarization map covering the full extent Milky Way's Central molecular zone (CMZ). The data, obtained with the PILOT balloon-borne experiment, covers the Galactic Center region…

The dust sub-millimetre polarisation of star-forming clouds carries information on dust and the role of magnetic fields in cloud evolution. With observations of a dense filamentary cloud G035.39-00.33, we aim to characterise the dust…

We present corrections for the change in the apparent scalelengths, central surface brightnesses and axis ratios due to the presence of dust in pure disk galaxies, as a function of inclination, central face-on opacity in the B-band…

天体物理学 · 物理学 2009-11-11 C. Möllenhoff , C. C. Popescu , R. J. Tuffs

The path to understanding star formation processes begins with the study of the formation of molecular clouds. The outskirts of these clouds are characterized by low column densities that allow the penetration of ultraviolet radiation,…

星系天体物理 · 物理学 2021-02-24 L. Beitia-Antero , A. I. Gómez de Castro , J. C. Vallejo

Recent observational progress has challenged the dust grain-alignment theories used to explain the polarized dust emission routinely observed in star-forming cores. In an effort to improve our understanding of the dust grain alignment…

Galactic winds probe how stellar feedback regulates the mass and metallicity of galaxies. Observations show that galactic winds are multiphase and magnetised. In the local Universe, the dense phase is traced by emission and absorption…

Dust is a ubiquitous component in our Galaxy. It accounts for only $1\%$ mass of the ISM but still is an essential part of the Galaxy. It affects our view of the Galaxy by obscuring the starlight at shorter wavelengths and re-emitting in…

星系天体物理 · 物理学 2023-11-17 Namita Uppal , Shashikiran Ganesh , Santosh Joshi , Mrinmoy Sarkar , Prachi Prajapati , Athul Dileep

The Planck Catalogue of Galactic Cold Clumps (PGCC) contains over 13000 sources detected based on their cold dust signature. They are believed to consist of a mixture of quiescent, pre-stellar, and already star-forming objects. We extracted…

星系天体物理 · 物理学 2019-09-25 Mika Juvela , Paolo Padoan , Isabelle Ristorcelli , Veli-Matti Pelkonen

Magnetically and thermally driven disk winds have gained popularity in the light of the current paradigm of low viscosities in protoplanetary disks that nevertheless present large accretion rates even in the presence of inner cavities. The…

地球与行星天体物理 · 物理学 2022-03-14 Peter J. Rodenkirch , Cornelis P. Dullemond

We examine the effect of magnetic fields on star cluster formation by performing simulations following the self-gravitating collapse of a turbulent molecular cloud to form stars in ideal MHD. The collapse of the cloud is computed for global…

天体物理学 · 物理学 2009-11-13 Daniel Price , Matthew Bate

Context: In the last years, there have been many studies on the omnipresence and structures of filaments in star-forming regions, as well as their role in the process of star formation. Those filaments are normally identified as elongated…

星系天体物理 · 物理学 2016-08-10 R. -A. Chira , R. Siebenmorgen , Th. Henning , J. Kainulainen

Dust polarization in millimeter (and centimeter) has been mapped in disks around an increasing number of young stellar objects. It is usually thought to come from emission by magnetically aligned (non-spherical) grains, but can also be…

We numerically model the collapse of magnetic rotating protostellar clouds with mass of 10 $M_{sun}$. The simulations are carried out with the help of 2D MHD code Enlil. The structure of the cloud at the isothermal stage of the collapse is…

太阳与恒星天体物理 · 物理学 2022-04-08 N. S. Kargaltseva , S. A. Khaibrakhmanov , A. E. Dudorov , S. N. Zamozdra , A. G. Zhilkin

There is a long-standing discussion in the astrophysical/astrochemical community as to the structure and morphology of dust grains in various astrophysical environments (e.g., interstellar clouds, protostellar envelopes, protoplanetary and…

The mass-to-magnetic flux ratio of molecular clouds is a parameter of central importance as it quantifies the dynamical significance of the magnetic field with respect to gravitational forces. Therefore, it can provide invaluable…

星系天体物理 · 物理学 2025-12-10 Aris Tritsis

3D Galactic magnetic fields are critical for understanding the interstellar medium, Galactic foreground polarization, and the propagation of ultra-high-energy cosmic rays. Leveraging recent theoretical insights into anisotropic…

星系天体物理 · 物理学 2025-07-23 Yue Hu

Polarized emission from aligned dust is a crucial tool for studies of magnetism in the ISM and a troublesome contaminant for studies of CMB polarization. In each case, an understanding of the significance of the polarization signal requires…

Recent high-angular-resolution (up to 0.7") dust polarization observations toward star forming regions are summarized. With the Sub-Millimeter Array, the emission from the dense structures is traced and resolved. The detected magnetic field…

星系天体物理 · 物理学 2012-02-22 Ya-Wen Tang , Patrick M. Koch , Paul T. P. Ho

Dust coagulation in a protoplanetary disk is the first step of planetesimal formation. However, a pathway from dust aggregates to planetesimals remains unclear. Both numerical simulations and laboratory experiments have suggested the…

地球与行星天体物理 · 物理学 2020-01-08 Ryo Tazaki , Hidekazu Tanaka , Akimasa Kataoka , Satoshi Okuzumi , Takayuki Muto

We define a sample of 200 protostellar outflows showing blue and redshifted CO emission in the nearby molecular clouds Ophiuchus, Taurus, Perseus and Orion to investigate the correlation between outflow orientations and local, but…

星系天体物理 · 物理学 2022-12-21 Duo Xu , Stella S. R. Offner , Robert Gutermuth , Jonathan C. Tan